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  <section id="link-warning-as-error">
<span id="prop_tgt:LINK_WARNING_AS_ERROR"></span><h1>LINK_WARNING_AS_ERROR<a class="headerlink" href="#link-warning-as-error" title="Link to this heading">¶</a></h1>
<div class="versionadded">
<p><span class="versionmodified added">Added in version 4.0.</span></p>
</div>
<p>Specify whether to treat warnings on link as errors.
If enabled, adds a flag to treat warnings on link as errors.
If the <a class="reference internal" href="../manual/cmake.1.html#cmdoption-cmake-link-no-warning-as-error"><code class="xref std std-option docutils literal notranslate"><span class="pre">cmake</span> <span class="pre">--link-no-warning-as-error</span></code></a> option is given
on the <span class="target" id="index-0-manual:cmake(1)"></span><a class="reference internal" href="../manual/cmake.1.html#manual:cmake(1)" title="cmake(1)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">cmake(1)</span></code></a> command line, this property is ignored.</p>
<p>This property takes a <a class="reference internal" href="../manual/cmake-language.7.html#cmake-language-lists"><span class="std std-ref">semicolon-separated-list</span></a> of
the following values:</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">LINKER</span></code>: treat the linker warnings as errors.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">DRIVER</span></code>: treat the compiler warnings as errors when used to drive the link
step. See the <span class="target" id="index-0-prop_tgt:COMPILE_WARNING_AS_ERROR"></span><a class="reference internal" href="COMPILE_WARNING_AS_ERROR.html#prop_tgt:COMPILE_WARNING_AS_ERROR" title="COMPILE_WARNING_AS_ERROR"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">COMPILE_WARNING_AS_ERROR</span></code></a> target property for more
information.</p></li>
</ul>
<p>Moreover, for consistency with the <span class="target" id="index-1-prop_tgt:COMPILE_WARNING_AS_ERROR"></span><a class="reference internal" href="COMPILE_WARNING_AS_ERROR.html#prop_tgt:COMPILE_WARNING_AS_ERROR" title="COMPILE_WARNING_AS_ERROR"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">COMPILE_WARNING_AS_ERROR</span></code></a> target
property, a boolean value can be specified:</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">True</span></code> value: this is equivalent to <code class="docutils literal notranslate"><span class="pre">LINKER</span></code> and <code class="docutils literal notranslate"><span class="pre">DRIVER</span></code> values.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">False</span></code> value: deactivate this feature for the target.</p></li>
</ul>
<p>This property is not implemented for all linkers.  It is silently ignored
if there is no implementation for the linker being used.  The currently
implemented <span class="target" id="index-0-variable:CMAKE_&lt;LANG&gt;_COMPILER_LINKER_ID"></span><a class="reference internal" href="../variable/CMAKE_LANG_COMPILER_LINKER_ID.html#variable:CMAKE_&lt;LANG&gt;_COMPILER_LINKER_ID" title="CMAKE_&lt;LANG&gt;_COMPILER_LINKER_ID"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">compiler</span> <span class="pre">linker</span> <span class="pre">IDs</span></code></a>
are:</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">AIX</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">AppleClang</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">GNU</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">GNUgold</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">LLD</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">MOLD</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">MSVC</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">Solaris</span></code></p></li>
</ul>
<p>This property is initialized by the value of the variable
<span class="target" id="index-0-variable:CMAKE_LINK_WARNING_AS_ERROR"></span><a class="reference internal" href="../variable/CMAKE_LINK_WARNING_AS_ERROR.html#variable:CMAKE_LINK_WARNING_AS_ERROR" title="CMAKE_LINK_WARNING_AS_ERROR"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_LINK_WARNING_AS_ERROR</span></code></a> if it is set when a target is
created.</p>
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